

ABSTRACT

This cannula assembly for injecting medicinal fluid into an annimal&#39;s teat has a first tapered cannula (22) formed with a circumferential bead (32) at its wider end. A flexible jacket (34) encloses the cannula and has another bead (40) detachably engaging the bead on the cannula. A tapered second cannula (42) extends forwardly from the jacket. This cannula is substantially different in length than the first cannula. A closure means such as a flexible cap (50) has an internal bead (58) which detachably engages a corresponding bead (46) at the wider end of the second cannula. This assembly provides the user with a choice of cannulas of two different sizes in treating a teat. In another form of the invention, a second flexible jacket (34 min ) has a bead (40 min ) which detachably engages a bead (70) on the second cannula (64). A third cannula (42 min ) extends forwardly from the second jacket. A flexible cap (50) detachably engages a bead (46 min ) on the third cannula, so that the use has a choice of cannulas of three different lengths in treating a teat.



